···

       
12
       
12
       
 
       
const newOpts = (prev, next) => ({

     

       
13
       
13
       
 
       
  index: next.index != null ? next.index : prev.index,

     

       
14
       
14
       
 
       
  length: next.length != null ? next.length : prev.length,

     

       
15
       
15
       
-
       
  onAbort: onAbort.length != null ? onAbort.length : onAbort.length,

     

       
16
       
16
       
-
       
  abort: abort.length != null ? abort.length : abort.length,

     

       
17
       
17
       
-
       
  capturing: capturing.length != null ? capturing.length : capturing.length,

     

       
15
       
15
       
+
       
  onAbort: next.onAbort != null ? next.onAbort : prev.onAbort,

     

       
16
       
16
       
+
       
  abort: next.abort != null ? next.abort : prev.abort,

     

       
17
       
17
       
+
       
  capturing: next.capturing != null ? next.capturing : prev.capturing,

     

       
18
       
18
       
 
       
});

     

       
19
       
19
       
 
       


     

       
20
       
20
       
 
       
const assignIndex = (depth) =>